Spatiotemporal dynamics of marine microbial communities following a <i>Phaeocystis</i> bloom: biogeography and co‐occurrence patterns

Xu, Sha; He, Cheng; Song, Shuqun; Li, Caiwen

doi:10.1111/1758-2229.12929

Cited by 9 publications

(5 citation statements)

References 66 publications

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“…In the present study, dominant bacteria in the intracolonial fluid were completely different from the dominant bacteria observed by Xu et al (2021) during P. globosa blooms, neither in free-living fraction (0.22-3 μm) nor in particle-attached fraction (3-20 μm). However, NS5 marine group, which belongs to Proteobacteria, was observed as one of the dominant bacteria in seawater free-living fractions at the bloom site from both studies.…”

Section: Discussioncontrasting

confidence: 95%

“…A number of bacteria in ambient seawater were clearly associated with Phaeocystis, and it was suggested that the bacteria and Phaeocystis established a mutualistic association (Delmont et al, 2014). In the northern Beibu Gulf of China, Xu et al, 2021 demonstrated that microbial communities from P. globosa bloom and non-bloom sites exhibited distinct community composition, and the bloom microbes were likely driven by high environmental selection. However, the microbial community enclosed by the colony envelope is still unknown, and hence the importance of the microenvironment in establishing the unique phytoplanktonbacteria association remains unclear.…”

Section: Introductionmentioning

confidence: 99%

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Bacterial Composition Associated With Giant Colonies of the Harmful Algal Species Phaeocystis globosa

et al. 2021

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The cosmopolitan algae Phaeocystis globosa forms harmful algal blooms frequently in a number of tropical and subtropical coastal regions in the past two decades. During the bloom, the giant colony, which is formed by P. globosa, is the dominant morphotype. However, the microenvironment and the microbial composition in the intracolonial fluid are poorly understood. Here, we used high-throughput 16S rRNA amplicon sequencing to examine the bacterial composition and predicted functions in intracolonial fluid. Compared with the bacterial consortia in ambient seawater, intracolonial fluids possessed the lower levels of microbial richness and diversity, implying selectivity of bacteria by the unique intracolonial microenvironment enclosed within the P. globosa polysaccharide envelope. The bacterial consortia in intracolonial fluid were dominated by Balneola (48.6% of total abundance) and Labrezia (28.5%). The bacteria and microbial function enriched in intracolonial fluid were involved in aromatic benzenoid compounds degradation, DMSP and DMS production and consumption, and antibacterial compounds synthesis. We suggest that the P. globosa colonial envelope allows for the formation of a specific microenvironment; thus, the unique microbial consortia inhabiting intracolonial fluid has close interaction with P. globosa cells, which may benefit colony development.

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Section: Discussioncontrasting

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Bacterial Composition Associated With Giant Colonies of the Harmful Algal Species Phaeocystis globosa

et al. 2021

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“…In addition, the most dominant bacterial genus, Marinobacter , as identified in this study, was not the most dominant one in previous studies which used P . globosa strains differ from the current study ( Xu et al, 2021a , b ; Zhu et al, 2021 ). These results suggest that different P .…”

Section: Discussioncontrasting

confidence: 91%

“…Plates were then incubated at 20°C for 7 days in the dark. Bacterial colonies exhibiting different morphological characteristics were isolated and stored in marine broth 2216 (MB, BD Difco) supplemented with 20% glycerol to form stocks that were stored at −80°C for future experiments ( Xu et al, 2021a , b ).…”

Section: Methodsmentioning

confidence: 99%

Bacteria Associated With Phaeocystis globosa and Their Influence on Colony Formation

Wang

Liu

et al. 2022

Front. Microbiol.

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Phaeocystis globosa (P. globosa) is one of the dominant algae during harmful algal blooms (HABs) in coastal regions of Southern China. P. globosa exhibits complex heteromorphic life cycles that could switch between solitary cells and colonies. The ecological success of P. globosa has been attributed to its colony formation, although underlying mechanisms remain unknown. Here, we investigated different bacterial communities associated with P. globosa colonies and their influence on colony formation of two P. globosa strains isolated from coastal waters of Guangxi (GX) and Shantou (ST). Eight operational taxonomic units (OTUs) were observed in ST co-cultures and were identified as biomarkers based on Linear discriminant analysis Effect Size (LEfSe) analysis, while seven biomarkers were identified in P. globosa GX co-cultures. Bacterial communities associated with the P. globosa GX were more diverse than those of the ST strain. The most dominant phylum in the two co-cultures was Proteobacteria, within which Marinobacter was the most abundant genus in both GX and ST co-cultures. Bacteroidota were only observed in the GX co-cultures and Planctomycetota were only observed in the ST co-cultures. Co-culture experiments revealed that P. globosa colony formation was not influenced by low and medium cell densities of Marinobacter sp. GS7, but was inhibited by high cell densities of Marinobacter sp. GS7. Overall, these results indicated that the associated bacteria are selected by different P. globosa strains, which may affect the colony formation and development of P. globosa.

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“…For example, nitrogen-fixing bacteria supply inorganic nitrogen to cyanobacteria in exchange for organic exudates ( Yang et al, 2017 ). In another example, the genera Sphingopyxis and Limnobacter (of Proteobacteria ) can degrade microcystins produced by Cyanobacteria ( Yang et al, 2017 ; Xu et al, 2021 ). On a separate note, human-associated pathogenic bacteria were enriched in both the PA and FL fractions in Lake Tianmu, which may pose a health hazard to humans reliant on Lake Tianmu for water ( Li et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Spatiotemporal variations, assembly processes, and co-occurrence patterns of particle-attached and free-living bacteria in a large drinking water reservoir in China

Xie

Shen

et al. 2023

Front. Microbiol.

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Particle-attached (PA) and free-living (FL) bacterial communities are sensitive to pollutant concentrations and play an essential role in biogeochemical processes and water quality maintenance in aquatic ecosystems. However, the spatiotemporal variations, assembly processes, co-occurrence patterns, and environmental interactions of PA and FL bacteria in drinking water reservoirs remain as yet unexplored. To bridge this gap, we collected samples from 10 sites across four seasons in Lake Tianmu, a large drinking water reservoir in China. Analysis of 16S rRNA gene libraries demonstrated spatiotemporal variations in bacterial diversity and identified differences in bacterial community composition (BCC) between PA and FL lifestyles. Capacity for nitrogen respiration, nitrogen fixation, and nitrate denitrification was enriched in the PA lifestyle, while photosynthesis, methylotrophy, and methanol oxidation were enriched in the FL lifestyle. Deterministic processes, including interspecies interactions and environmental filtration, dominated the assembly of both PA and FL bacterial communities. The influence of environmental filtration on the FL community was stronger than that on the PA community, indicating that bacteria in the FL lifestyle were more sensitive to environmental variation. Co-occurrence patterns and keystone taxa differed between PA and FL lifestyles. The ecological functions of keystone taxa in the PA lifestyle were associated with the supply and recycling of nutrients, while those in FL were associated with the degradation of complex pollutants. PA communities were more stable than FL communities in the face of changing environmental conditions. Nutrients (e.g., TDN and NO3–) and abiotic and biotic factors (e.g., WT and Chl-a) exerted positive and negative effects, respectively, on the co-occurrence networks of both lifestyles. These results improve our understanding of assembly processes, co-occurrence patterns, and environmental interactions within PA and FL communities in a drinking water reservoir.

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Spatiotemporal dynamics of marine microbial communities following a Phaeocystis bloom: biogeography and co‐occurrence patterns

Cited by 9 publications

References 66 publications

Bacterial Composition Associated With Giant Colonies of the Harmful Algal Species Phaeocystis globosa

Bacterial Composition Associated With Giant Colonies of the Harmful Algal Species Phaeocystis globosa

Bacteria Associated With Phaeocystis globosa and Their Influence on Colony Formation

Spatiotemporal variations, assembly processes, and co-occurrence patterns of particle-attached and free-living bacteria in a large drinking water reservoir in China

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